Enhanced Photoelectrochemical Performance of Coaxial-Nanocoupled Strontium-Rich SrTiO3/TiO2 {001} Nanotube Arrays

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• 作者：Tao Yu ; Wen-li Hu ; Lixia Jia ; Xin Tan ; Juanru Huang ; Xiang Huang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2015
• 出版时间：August 26, 2015
• 年：2015
• 卷：54
• 期：33
• 页码：8193-8200
• 全文大小：623K
• ISSN：1520-5045

文摘

The composition of a photocatalyst is the fundamental determinant of its photoability. Recently, significant attention has been focused on the ternary oxide epitaxial overlayers. Here, a highly active {001} facet dominant coaxial-nanocoupled SrTiO₃/TiO₂ nanotube array thin film was fabricated by a modified two-step anodization combined with a hydrothermal process. Through photoelectrochemical (PEC) measurements, such a coaxial-nanocoupled SrTiO₃/TiO₂ {001} surface reconstruction can definitely improve its PEC performance. The enhanced PEC performance and strongest photocurrent response of SrTiO₃/TiO₂ nanotubes (STNs) with a 2 h hydrothermal treatment were ascribed to the fast electron transfer in coaxial nanoarchitecture.